Rhubarb and strawberry cookie streusel muffins

These huge, exciting muffins are more accurately delectable, single coffeecakes than they are muffins. Brightened with chunks of garden-picked rhubarb and fresh, diced, plump strawberries, they are further dolled up with a halo of shortbread-cookie streusel. Huge caps, buttery cookie topping – this is a cause for a celebration! This recipe also makes beautiful mini gift loaves.